Senior ML Engineer - Build & Scale Production AI Systems

Cognify Search; Greater London; On-site; GBP 90,000 - 150,000; Full time

Job summary

Cognify Search is seeking a Senior Machine Learning Engineer to scale ML capabilities from experimentation into reliable production in a hands-on, production-focused role in the UK. You will collaborate with Data Scientists, Software Engineers and Product teams to shape architecture, build production systems and create tooling that scales ML initiatives.

The role emphasizes end-to-end delivery, robust pipelines, model lifecycle automation and strong governance.

Qualifications

• Hands-on experience deploying ML models to production.

Responsibilities

• Own the end-to-end delivery of production ML and AI solutions, working closely with Data Science and Product teams.
• Design and build robust pipelines for model training, validation and deployment.
• Develop model packaging, deployment and lifecycle automation using modern tooling.
• Build monitoring and observability capabilities covering model performance, drift, reliability and operational health.
• Work across both batch and real-time ML workloads.
• Help take emerging LLM and AI capabilities into production, including RAG, tool use and agentic workflows.
• Contribute to the evolution of the internal ML/AI platform, improving experimentation, governance, reproducibility and collaboration.
• Build reusable tools and libraries that improve the speed and quality of ML development.
• Establish best practices around testing, CI/CD, model observability, evaluation and governance.
• Provide technical leadership through architecture discussions, design reviews, code reviews and mentoring.

Skills

Python

APIs

ML deployment

CI/CD

ML lifecycle

Mentoring

Communication

Tools

Databricks

MLflow

Airflow

Kubeflow

SageMaker

Vertex AI

Terraform

CloudFormation

LangChain

LangGraph

Job description

Cognify Search is seeking a Senior Machine Learning Engineer to scale ML capabilities from experimentation into reliable production in a hands-on, production-focused role in the UK. You will collaborate with Data Scientists, Software Engineers and Product teams to shape architecture, build production systems and create tooling that scales ML initiatives.

The role emphasizes end-to-end delivery, robust pipelines, model lifecycle automation and strong governance.